How to check presence of contact in kentico while importing contact through CSV ?

Currently I am using kentico 10 so by default its checking presence of a contact by only "EmailAddress" but instead of that i want to check by both "FirstName" and "Email". I think some thing we need to check in Bizform_insertBefore but not sure .Can you please help me out to resolve the same .

Recent Answers

if you then look up and find a match you can can the e.cancel() i believe, hopefully it will not stop the entire process. If it does, next option is to clean up your csv by manually importing to a temporary table, selecting any non duplicated contacts using SQL, then take that result and make a new clean csv to pass.

Sorry I should have clarified, you want to use the ContactInfo insert event, not bizform. You're using the wrong hook. Pretty much every class in Kentico has it's own events you can hook into. THis is through the ____Info.TYPEINFO.Events

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